Stopping device



E. N. PREBLE.

STOPPING DEVICE.

APPLICATION FILED OCT-30.1912.

Patented Aug. 1, 1916.

4 SHEET$SHEET l.

-E. N. PREBLE.

STOPPING DEVICE. APPLICATION FILE D OCT- 30, l9l2.

wwm rammem 1,1916.

4 SHEETS-SHEET 2- E. N. PBEBLE. STOPPING DEVICE.

APPLICATION FILED OCT-30,19.

1 19 3.,U5 6 Patented Aug. 1, 1916.

4 SHEETSSHEET 3.

E. N. PREBLE.

STOPPING DEVICE.

APPLICATION FILED OCT-30, 1912.

11116111611 Aug. 1, 1916.

4 SHEETS-SHEET 4.

EDWIN N. PEBBLE, 0F BEVERLY, MASSACHUSETTS, ASSIGNOR TO U1\TITEJD SHOEMACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATIUN OF NEW JERSEY.

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Patented Aug. I, 1191MB.

Application filed. October 30, 1912. Serial No. 728,585.

To all whom it may concern:

Be it known that I, EDWIN N. PREBLE, a citizen of the United States,residin at Beverly, in the county of Essex and tate of Massachusetts,have invented certain new and useful Improvements in Stopping Devices;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same;

This invention relates to stopping devices, and more particularly tostopping devices for arresting the rotation of a shaft at any point inits rotary movement.

Under certain circumstances, as when the clothing or body of theoperator is caught between the moving parts of a machine. it isdesirable to disconnect the main driving shaft of the machine from thesource of power and stop the machine at once. The disconnecting of themachine from the source of power and the .application of the brake, ifsuch is employed to stop the machine, often requires the exercise of sogreat an effort that it is practically impossible for the operator whosebody or clothing is caught in the machine to stop the machine. This isparticularly true in machineswhich employ certain forms of frictionclutches for connecting the main shaft with the source of power, sincethe members of the friction clutch are apt to stick and often requireconsiderable force to disengage them.

The primary object of the present invention is to produce an emergencystopping device by which a shaft may be disconnected from the source ofpower and its r0- tation arrested at once with the exercise of the leastpossible effort on the part of the operator.

With the above object in view one feature of the invention contemplatesthe provision in a stopping device of power operated mechanism under thecontrol of the operator for disconnecting the shaft from the drivingmechanism at any point in the rotation of the shaft.

In the preferred form of the invention a brake is employed to. arrestthe rotation of the shaft and the said power operated mechanism isarranged both to disengage the shaft from the driving mechanism and toengage the brake. In the accompanying drawings illustratmg the preferredform of the invention applied to a sole pressing machine; Figure 1 is aside elevation of the machine; Fig. 2 is a side elevation partly insection of the mech anlsm associated with the intermediate idle pulleyof the machine illustrating particu: larly the parts of the stopmechanism; Fig. 3 1s a front elevation of the mechanism illustrated nFig. 2, partly broken away and partly 1n section; Fig. 4 is a detailview in vertical section'illustrating certain parts of the mechanismshown in Fig. 2; Fig. -5 is a detall plan view of a portion of themechanism illustrated in Fig. 2, showing particularly a cam supported onthe intermediate idle pulley and forming part of the mechan1sm fordisconnecting the members of the driving clutch, and the mechanism forclutching the cam to the pulley; Fig. 6 is a front elevation of themechanism illustrated in Fig. 5; and Figs. 7 and 8 are detail elevationsof portions of the mechanism illustrated in Fig. 2. p Y

The sole pressing machine in which the invention, as illustrated in thedrawings, has been embodied, is the same in general con- 'struction andarrangement as the machine shown and described in the patent to Mayo, N0. 861,746, dated July 30, 1907. This machine is a double machine,comprising two sets of cooperating last and form carriers. The lastcarriers indicated at 1 are-mounted to oscillate upon a pivot rod 2 andare connected by means of links 3 with their respective form carriers 4which are pivoted upon a pivot rod 5 extending transversely of themachine. Each set of form and last carriers is operated from a crank 6carried by a transverse shaft 7 through a connecting link 8 which ispivotally connected with the last carrier, a separate shaft 7 beingprovided for each set of form and last carriers. Each crankshaft 7 isprovided with a worm gear 9 which is engaged by a worm 10 upon a shaft11 journaled in bearings in the frame 100 of the machine. Each shaft 11is provided at its rear end with a frictional clutch memtudinally of theshafts 11 "independently of the shaft. Thedrivingpulleys are providedwith-friction surfaces to engage'respectively the frictional clutchmembers 12 and means are provided for moving the pulleys long1-'.

each other so that each shaft 11 and crank shaft geared thereto can bedriven separately. The pulleys13 are rotated con stantly by means of asingle drivlng belt whichpasses over the pulleys and over anintermediate idlepulley. 14 mounted upon a, stud extending rearwardly'from the frame of the machine. ,The driving pulleys are moved into andout of engagement with their clutch members and their movements arecontrolled by mechanisms which are substantially duplicates ofileachother and it is therefore deemed sufficient to illustrate anddescribeonly one of such mechanisms 1 this application.

The driving pulley 13 at the rlght hand side of the machine (illustratedpartlcularly in Fig. 1) is rigidly mounted upon a sleeve 15, which ismounted to rotate loosely on the shaft '11 and is provided with a groove16 to receive studs 17 projecting from the forked upper end of one armof the lever 18-19 loosely pivotedupon a shaft 20 extending across therear of the machine and journaled in hearings in the frame thereof. Theother arm 19 of the lever 18-19 is connected by means of an adjustablelink 20 with the rearwardly extending arm 21 of a lever 21-22 journaledupon a shaft 23. The construction and arrangement of the link 20 and thelever 21-22 is such that when the arm 21 of the lever 21-22 is raisedinto the position in which it is illustrated in Fig. 1 the clutch member13 is moved into engagement with the cooperating clutch member 12, andwhen the arm 21 of said lever' 25 and the cam 24 secured thereto may berocked by the operator. The shape of the cam '24 is such that when thetreadle is depressed the high part of the cam 24 is caused to, engagethe anti-friction roll of the lever 2122 and raise the rear end of thelever, thereby actuating the lever1819 to move the pulley 13- intoengagement with the clutch member 12. Thepulley remains locked inengagement with the clutch member unti l the cam 24 isoscillated in theopposite direction, the shape and arrangement of the cam 24 being suchthat it remains in the position in which it is placed by the operator.Bythe depression of the. treadle at the right hand side of the machinetherefore, the right hand crank shaft 7 and the right hand set of lastand form carriers are thrown into operation. When the cam 24 is moved ina direction to release the lever 2122 the pulley 13 is moved out ofengagement with the clutch member 12 by means ofa coil spring 26attached at one extremity to the arm 22 of the lever 2122 and at theother to the frame of the machine, and by a second coil spring 27attached at one end to the machine frame and arm 18 of the lever whenthe disk 28 arrives at a position such that the roll on the arm 22 dropsinto the recess in the disk, the member 13 of the clutch is disengagedfrom the member 12 by the action of springs 26 and 27. The disk 28 isarranged on the crank shaft 7 in timed relation to the operation of thelast and form carriers so that the roll on the arm 22 drops into therecess of the said disk and the clutch members are disengaged when thelast and'form carriers reach a position of presentation. The cam 24 isconnected by a rod 29 with a second cam on the left hand side of themachine which actuates the lever corresponding to the lever 21.22 toengage the members of the driving clutch for the left hand set of lzistand form carriers. The cams 24: are arranged so that when one treadle isdepressed to throw one set of last and form carriers into operation, theother camis actuated to release the corresponding lever 2122 and causethe last and form carriers to come to rest when they have reached aposition of presentation. I

In order to stop the rotation of the shaft 11 as soon as the members ofthe driving clutch have been disconnected, a brake disk 30 is secured tothe shaft 11 and is arranged to be engaged by a brake shoe 31 pivoted atthe central joint of a toggle, consisting of members 32 and 33, of whichthe member '32 is pivoted on the frame of the machine and the member 33is pivotally connected with the arm 18 of the lever 18-19. The tensionof the springs 26-27 after the clutch memof the last and form carriersat a position of presentation, forces the brake shoe 31 into contactwith the brake disk 30.

It sometimes happens that the hand of the operator becomes caughtbetween the form and the last, and it is then necessary, in order toprevent serious injury to the operator, to stop the machine at once asotherwise the hand of the operator will be drawn in and crushed betweenthe form and the last. The machine embodying the present invention isprovided with mechanism under the control of the operator but operatedby the power by which the machine is driven for disconnecting themembers of the driving clutch and stopping the machine at any point inthe rotation of the shaft. This mechanism is constructed and arranged soit requires little effort on the part of the operator to set it inoperation and is very quick acting so that the clutch is disconnectedand the rotation of the shaft arrested al most instantly after the saidmechanism is set in operation. This mechanism comprises a yoke-shapedarm 34 secured to the shaft 20 and a link 35 connecting the arm 34 withthe link 20. The arm 19 of the lever 18-19 is provided with a slot whichreceives the pin connecting the link 20 with said arm, therebypermitting the link 20' to swing to the right about its connection withthe lever 21-22. With this construction when the shaft 20 is rotated tothe left (Fig. 1), the link 20 is swung to the right about itsconnectionwith the lever 21-22, thereby causing the lever 18-19 to swing on itsaxis in a direction to move the pulley 13 out of engagement with theclutch member 12 and to engage the brake shoe 31 with the brake disk 30.

Power actuated mechanism controlled by the operator is provided forrotating the shaft 20 to the left when it is desired to arrest at oncethe rotation of the shaft 11 at any point in its rotary movement. Thismechanism comprises an arm or lever fixed to the shaft 20, and a cam foractuating the lever mounted to rotate on a sleeve secured to the hub ofthe'idle pulley 14 but normally held from rotation. A clutch device isprovided for clutching the cam to the sleeve when it is desired to stopthe machine. The rotation of the cam then actuates the lever fixed tothe shaft 20 and the shaft is actuated to disconnect the clutch membersand engage the brake.

Referring to Figs. 2 to 8 inclusive of the drawings, a lever 36 is fixedto the shaft 20 at a point substantially opposite the shaft upon whichthe idle pulley 14 is mounted. This'lever is yoke-shaped, as illustratedin Fig. 3, the shaft 20 passing through the lower ends of the arms ofthe yoke. A roll '41 is mounted between lugs 42 formed on the lever 36and is arranged to engage a the ring is confined between an abutmentformed on the sleeve and a ring 48threaded 0n the end of the sleeve.This construction permits the sleeve 46 to rotate freely within the ring45 while the member 44 is held stationary. 'When the member 44 is causedto rotate in a right hand direction (Fig. 6) with the pulley 14, thelever 36 will be swung to the left (Fig. 2) by the engagement of theroll 41 with the cam flange 43 and turn the shaft 20 in a direction todisengage the clutch members 12 and 13 and apply the brake to stop themachine. In order to clutch the member 44 to th sleeve 46 and cause itto turn with the idle pulley, a. flange 49 is formed on the sleeve 46and constitutes one member of a clutch, the other member of whichconsists of a clutch shoe 50 pivoted on a rod or shaft 51 between thearms 52 of a member 53. The member 53 in turn is pivoted on a rod orshaft 54 supported by downwardly and rearwardly extending arms 55 on themember 44 and passing through the ends of the arms 52 which extendupwardly and rearwardly as illustrated in Fig. 2. The member 53 is thuspivoted and the clutch shoe 50 is supported thereby so that when theforward portion of said member is lifted, the clutch shoe will beengaged with the flange 49 to clutch the member 53 and the member 44upon which the member 53 is mounted to the sleeve 46, and cause themember 44 to rotate with the pulley 14. The member 44 and the member 53connected therewith are normally held from rotation with the sleeve4.6.by a coiled spring 53 connected at one extremity with the member 53and at the other with a fixed point on the machine frame. To provide forsupporting the member 53 in the position illustrated in Fig. 2 withrelation to its pivotal point, a cylindrical flange 56 is formed on saidmember 53, the outer surface of which is substantially co-axial with theaxis of the pulley 14 and the forward portion of the member .53 issupported by the engagement with said flange of a roll 57 mounted on ayoke 59 pivoted on a bracket 60 secured to the machine frame. Asecondroll 61 is mounted in the yoke 59 and rests on a table 62 formedon an arm 63 pivoted on a shaft 64 carried by forwardly projecting ears65 on the lever 36. The arm 63 is supported by a link 66 which connectssaid arm with a rearwardly projecting arm 67 formed on a lever 37loosely mounted on the shaft 20 between the arms ,of the lever 36 andextending upwardlybetween the arms of said lever to a point adjacent itsupper end. The link 66 is connected with the arm 67 by a shaft 68 andthe link is provided with a slot, as illustrated in Fig. 2, throughwhich the shaft passes. A plunger 69 actuated by a coil spring 7 O ismounted in the link 66 and engages the shaft 68 and normally supportsthe link with the shaft 68 at the lower end of the slot,'therebyproviding a yielding support for the table 62. A pull rod 71 ispivotally connected with the upper end of the lever 37 and is providedwith a handle at the front of the machine which may be 1 gripped by theoperator. When the lever 37 is swung to the left about the shaft 20 withrelation to the lever 36, the movement of the arms 67 acting through thelink 66 will lift the table 62, the outer end of the yoke 59 and theforward portion of the member 53. During the normal operation of themachine, the parts of the above described mechanism occupy the positionsillustrated in Figs. 2 and 3, the sleeve 46 turning freely within thering 45 of the member 44 without affecting said member. When it isdesired tostop the machine at once, the o erator grasps the handle onthe pull rod 1 and gives a slight forward pull on said rod, therebyswinging the lever 37 about the shaft 20. A latch 38 is pivoted at 39 onthe upper end of the lever 36 and normally rests on the upper face of ashoulder or projection 40 on the upper extremity of the lever 37. Thismovement of the lever 37 causes the latch 38 to drop behind the shoulder40 and lifts the table-62 and the arm 59 causing the member 53-to swingabout the shaft 54 to engage the clutch shoe with the flange 49. Themember 44 is thereby clutched'to and caused to rotate with the sleeve46. The turning of the cam flange 43 swings the lever 36 to the left(Fig. '2), which rotates the shaft 20 in a direction to disengage themembers of the driving clutch and engage the brake to stop the machine.By reason of the engagement of the latch 38 behind the shoulder 40, thelever 37 is caused to swing with the lever 36. When the shaft 20 hasbeen rotatedsufiiciently to disengage the clutch members and engage thebrake, the latch 38 is lifted from behind the shoul der 40 by theengagement of an upwardly projectingarm on said latch with an adjustablestop screw 72 mounted on the frame of the machine. 'After th e latch 38is lifted from behindthe shoulder 40, the lever 36 swings to the left aslight distance independently of the lever 37 and the table 62.

'is thereby lowered sufliciently to disengage the clutch shoe 50 fromthe flange 49. The

member 53 and the mechanism connected therewith are then restored to thepositions illustrated in Figs. 2 and 3 by the spring 53. The drivingclutch members are, however, held in disengagement until the op-- eratorgrasps thepull rod and actuates the same to restore the levers 36 and 37to the positions illustrated in Fig. 2. A stop screw 7 3 is threadedinto a lug 74 on the lever 37 and engages a lug 75 on the lever 36 tocause the lever 36 and the shaft 20 to swing with the lever 37 when therod'71 is actuated to restore the parts to their normal positions.

A very slight effort is required to throw the above mechanism fordisconnecting the clutch members into operation and the rotation of theshaft is arrested and the machine stopped almost instantly after theactuation of the pull rod. The actuation of the power disconnectingmechanism by the power by which the machine is driven also renders thismechanism much more certain and reliable than mechanisms which areactuated by the operator. Although the invention has been illustratedand described as applied to a sole pressing machine, it is to beunderstood that invention is not limited to any particular constructionor arrangement of parts.

Having explained the nature and object of the invention and havingspecifically d6.

scribed the preferred embodiment thereof, what is claimed is 1. A stopmechanism, having, in combination, a shaft, driving mechanism for theshaft, means acting normally to maintain the driving mechanism indriving connection with the shaft until the shaft has executed apredetermined rotary movement after the driving mechanism has beenconnected therewith, and then to permit the driving mechanism to bedisconnected from the shaft and mechanism actuated by the power by whichthe shaft is driven when thrown into action to disconnect the drivingmechanism from the shaft at any point in the rotation of the shaft.

'2. A stop mechanism, having, in combination, a shaft, driving'mechanismfor the shaft, devices for arresting the rotation of the shaft, andmeans constructed and arranged to be actuated at once by the power bywhich the-shaft is driven when thrown into action to disconnect thedriving mechanism from the shaft and engage the'arresting devices tostop the shaft at any point in the rotation of the shaft.

3. A stop mechanism, having, in combination, a shaft, driving mechanismfor the shaft, means acting normally to maintain the driving mechanismin driving connection withthe shaft until the shaft has executed apredetermined rotary movement after the driving mechanism has beenconnected therewith, and then to permit the driving mechanism to bedisconnected from the shaft and power operated mechanism mes es underthe control of the operator for throwdriving any point in the control ofthe operator for disengaging the clutch'members and stopping the shaftat any point in the rotation of the shaft.

5. A stop mechanism, having, incombination,- a shaft, driving mechanismfor the shaft, a brake, and mechanism under the control of the operatorand operated by the power bywhich the shaft is driven for throwing thedriving mechanism out of driving connection with the shaft and engagingthebrake to stop the shaft at any point in the rotation of the shaft.

6. A stop mechanism, having, in combination, a shaft, driving mechanismfor the shaft, means to prevent the driving mechanism from being thrownout of driving connection with the shaft except at a definite point inthe rotation of the shaft and mechanism under the control of theoperator and operated by the power by which the shaft v 1s driven forthrowing the driving mechanism out of driving connection with the shaftat any point in the rotation of the shaft.

7. A stop mechanism, having, in combination, a shaft, a driving clutchmember, a driven clutch member, a brake, and mechanism under the controlof the-operator and operated by the power by which the shaft is drivenfor disengaging the clutch members and engaging the brake to stop theshaft at any point in the rotation of the shaft.

8. A stop mechanism, having, in combination, a shaft, driving mechanismfor the shaft, means acting normally to maintain the driving mechanismin driving connection with the shaft until the shaft has exe cuted apredetermined rotary movement after the driving mechanism has beenconnected therewith, and then to disconnect'the driving mechanism fromthe shaft power operated mechanism for throwing the driving mechanismout of driving connection with the shaft at any point in the rotation ofthe shaft, and means under the control of the operator to throw saidlast mechanism into operation.

9. A stop mechanism, having, in combination, a shaft, a driving clutchmember, a driven clutch member, mechanism acting normally to maintainthe clutch members in engagement until the shaft has executed apredetermined rotary movement after the clutch members are engaged, andthen to disengage the clutch members and stop the 'shaft means todisconnect the clutch members and stop the shaft at any point in therotation thereof comprising a normally stationary cam, means under thecontrol of the operator to cause the actuation of the cam by' power andmechanism actuated by the cam. to disconnect the clutch members and stopthe shaft. I

10. A stop mechanism, having, in combination,a shaft, a driving clutchmember, a driven clutch member, mechanism acting normally to maintainthe clutch members in engagement until the shaft has executed apredetermined rotary movement after the clutch members are engaged aconstantly rotating member, means to disconnect the clutch members tostop the shaft comprising a normally stationary cam, means under thecontrol of the operator to clutch the cam to the constantly rotatingmember, and mechanism actuated by the cam to disconnect the clutchmembers.

11. A stop mechanism having, in combination, a shaft, driving mechanismfor the shaft, devices for arresting the rotation of the shaft, meansactuated by the power by which the shaft is driven when thrown intoaction to disconnect the driving mechanism from the shaft and engage thearresting devices to stop the shaft at once, and mechanism under controlof the operator for throwing said means into action at any point in therotation of the shaft.

12. A stop mechanism, having, in combi nation, a shaft, drivingmechanism for the shaft, means acting normally to maintain the drivingmechanism in driving connection with the shaft until the shaft hasexecuted a predetermined rotary movement after the driving mechanism hasbeen connected therewith and then to disconnect the shaft from thedriving mechanism, and mechanism actuated by the power by which theshaft is driven when thrown into action to disconnect the drivingmechanism from the shaft at any point in the rotation of the shaft.

13. A stop mechanism, having, in combination, a shaft, driving mechanismfor the shaft, devices for arresting the rotation of the shaft, meansacting normally to maintain the driving mechanism in driving connectionwith the shaft until the shaft has arresting devices to stop the shaftat once at any point in the rotation of the shaft.

14. A stopping mechanism, having, in combination, a shaft, drivingmechanism for 5 the shaft, positively operating means acting normally tomaintain the driving mechanism in driving connection with the shaftuntil the shaft has executed a predetermined rotary movement after thedriving mecha- 10 nism has 'been connected therewith, and

mechanism actuated by the power by which the shaft is driven when throwninto action to disconnect the driving mechanism from the fshaft at anypoint in the rotation of the sha t.

EDWIN N. PREBLE.

Witnesses: I

CHESTER E. ROGERS, RUTEL E. WARD.

